Talk:Brownian tree: Difference between revisions

Note that "collide" is not defined. In one implementation "collide" means that the particle lands on a fixed particle (and then its previous position is used). In another implementation (mine), "collide" means that the particle reaches a position adjacent to a fixed particle. I do not know if this ambiguity matters, but I thought I would mention it. --[[User:Rdm|Rdm]] 11:54, 14 July 2010 (UTC)

: It's interesting, but I don't think it matters; there are enough differences between languages that a retrace step in the algorithm doesn't seem important. --[[User:Short Circuit|Michael Mol]] 16:38, 14 July 2010 (UTC)

::: Yes, I also observed that minute changes can really effect the look of the brownian tree. I was experimenting with the maximum field (with the REXX program) that I could view (in a DOS prompt screen under Windows) and tried various densities (expressed as a percentage), and it appeared that about 10% -->25% ''looked'' about right (as far as esthetically looking brownian trees go). To quote an old saw, ''I can't define what a brownian tree should like like, but I know one when I see one''. -- [[User:Gerard Schildberger|Gerard Schildberger]] 20:28, 28 June 2012 (UTC)

 

Originally the D entry derived from the C entry. And later some other language entries have derived from the C/D entries. But the I think the C and C-derived entries don't respect the rules well (it moves already set particles, it doesn't always attach a particle if one of its Moore neighborhood cells is set), so I have rewritten the D entry. I think this D entry is closer to the literature value (1.71) of the resulting fractal dimension of DLA process. The fractal dimension is now lower than the C version (so the resulting tree is less dense), because the attach probability is higher, this causes a faster dendrite growth.--[[User:Bearophile|Bearophile]] 23:19, 27 June 2012 (UTC)

 

After implementing and experimenting a while, I just thought about a restriction I placed on the movement of the particles (I called them dust motes).

 

 

Seeing that the link for the AutoHotkey image is dead (404), is it necessary to add an examle image as example output? Only 15 of the 35 languages have images embedded. --[[User:Oenone|Oenone]] ([[User talk:Oenone|talk]]) 14:28, 17 July 2014 (UTC)